Motor apparatus for operating doors and the like.



A. GOTTSGHALK.

mo'ron APPARATUS FOR OPERATING noons um THE LIKE.

APPLIOATIOR FILED AUG. 8, 1912.

Patented June 17, 1913.

2 BHEETHKEET l.

f i V V V NRR I/I/III/IIIII/I/IIII/I/IIIII/II/fiVIII qmi/lmeooco anven OZ A. GOTTSOHALK. HOTOB APPARATUS FOR OPERATING D0038 AND THE LIKE.

APPLI OATI OI FILED AUG. 8, 1912.

Patented June 17, 1913.

2 BEEETHHEET 2.

gcnorul ly.

UNITED STATES PATENT OFFICE.

ALBERT oorrscnALx, or NE'ivYoRK, N. Y.. ASSIGNOB. TO NATIONAL PNEUMATIC t COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION or wnsr vmomm.

MOTOR APPARATUS FOR OPERATING DOORS AND THE LIKE.

Specification of Letters Patent.

.lutonted June 17,1913.

Original application filed September 24, 1909, Serial No. 519,482. Divided and this application filed August 2, 1912. Serial No. 712,849.

To all whom it mayconocrn:

lio it known that. l, Auunrr (io'rrsouALK, u (ritizcn of the United States, residing at New York, in the county of New York and 5 State of New York, have iliVt'lltt'tl .a certain new and usoful Improvement. in Motor Apparatus for mruting Doors and the Like, of which impi'ovomcnt tho following is a spot-.ifit-ation. A

This invention relates to a. fluid pressure dovioo for operating doors, gates, and the like, and particularly our doors such as used in cars of olcvatod railways, subways, local suburban tratlic and oh'otrio trsuetion service ()no of tho ohjm-Its of my invention is to provide an improvod fluid ln-cssuro operated dovioo of this character and having means for automatically cutting ofl all. supply of fluid to the motor when tho sumo is movod to oit-hor and of its stroke, t-herehv prcvonting lnulcugo and wusto of fluid during the limo that. the device stands in either the open or (closed posit-ion; and another object is to provide improved moans for cushioning the movement of tho llt'VlCfl noar tho end of its stroko in ordor to provont slamming.

This application is a division of my original application Sor. No. 519,432, filed Septomhcr 24, 1909.

Tn tho accompanying drawing which illustrates a profm'rod form of construction embodying my improvements, Figure 1 is u vortioal section taken on the line a- -a of Figs. 2 and 4;-l 1g. 2, a horizontal section takon on the lino h b of l igsfl and 4; Fig. 3, a side elevation with tho valve actuating motor indicated in vertical section; Fig. 4,, a control transversescction} Fig. *5, a

40 faoo view ofthc valve seat; Fig. 6, a face viow of the valve; and Fig. 7, an elevation on a snudlor sonic, indicating a proforrod location of tho motor and its ('fllllimfi-lnll to tho door.

Various forms of fluid pl'cssul'o 'motors may in. omploycd for nil-hinting lho' door hut thononstruotion horo illustratml is of a type having a long cylinder 8 with a double headed piston, the heads 9 being joined by a rod or bar, it), having rack teeth, 11, adapt- .cd to engage the goal-0d segment, 12, on the rock shaft, 13, and operate an arm, 14, which may ho conncctod to move the door iii any desired manner, for instant-.0, as indlcat ed in .Fig. 7. A valve is employed for controlling electrical connections extendingwithin reach of the operator who is to control the operation of the door. A Supply pipe, 20, leadull rods or any suitable form of meohunica or ing from a source of fluid pressure such-us a reservoir of compressed air, communicates throuph port, 21, in valve seat and. ort, 22, in vo ve, 15, with the valve chum er, the port, 22,- having on extension or cavity, 23, m the face of the valve so thatthe compressed air or other fluid is admitted to the valve chamber in all the positions of the valve. Ports, 24 and 25,1ead from the valve seat to the opposite ends of actuating cylinder, 8, for a V mittin fluid under pressure to open and close the door. Thevalvo is also provided with'ports, 26 and 27, communicating with a groove, 28, in tho face of the valve and with the exhaust port, 29, in the seat. When the valve'is in its nornmhm" cylinder is cut off, the orts, 24am 25, be-

ing closed. The valve ever is oscillated in one direction for connecting supply )ort, 22, :uulgrmvc, 23, with port, 24, and ill nnttmg I pressed sufliciently toward the end of the fluid under pressure to the left end of cylinder, 8, for moving the piston to open the door, and the lever is turned in the opposite direction from its normal or lap position to connect port, 22, and oove, 23, with port, 25, for admitting fluid to the right end of the cylinder for closing the door. In order that the valve may normally occupy its lap position with the supply to either end of the cylinder cut off when the door is in either its open or closed position, and thereby prevent leakage, I provide fluid pressure actu ated means for automatically shiftin the valve to lap position and thereby cut 0 the supply of fluid to the motor, when the same has moved to either end of its stroke. Various forms of mechanism for this purpose may be devised, that shown herein comprising a valve shifting motor having cylinder, 30, communicating by ports, 31 and 32, with the door actuating cylinder, a (1 containing a double piston with opposite eads, 33, con-.

nected by rack bar, 34, which engages teeth on the oscillating sleeve, 35, mounted on the valve casing and provided with a projection, 36, adapted to engage the valve lever and shift the same to its horizontal position. According to another feature of my imrovement means are provided for cushionmg the door at either end of its movement by compressing the fluid remaining at' atmospheric pressure in the opposite end of the'main motor cylinder, and this comprises ports through which the compressed air or other fluid may freely exhaust from the.

main motor cylinder to the atmosphere, such as ports, 31 and 32, and ports, 37 and 38, in the valve shifting cylinder, and a restricted port, such as exhaust port,\29, in the valve seat, through which the atmospheric air is forced from the cylinder, after piston 9, has cut off ports'31 and 32. w

The device then operates as follows: To close the door the operator turns. the valve lever to position for connecting ports, 23 and" 22, with port, 25, to admit fluid under pressure to right end of cylinder, 8. The pistop, 9, then moves toward the left turning segment, 12, shaft, 13, and arm, 14, and thereby moving the door to its closedposition. As the piston, 9, passes the port, 31, the air at atmospheric pressure contained in the cylinder, 8, at the left of the iston is forced out through ports, 24, 28 an 29, and as this is a restricted passage the air is comstroke to retard the movement and form a cushion to prevent slammin of the door. As the piston, 9, reaches the e d of its stroke and passes the ort, 32, the fluid passes into the right end 0 the valve shifting cylinder, 30, forcingpiston, 33, to the left and thereturning the sleeve, 35, so that its pro ection, 36, engages the inclined lever, 19, and

shifts the same with the valve to normal lap position. This cuts off the supply of fluid and opens both ends of the main motor cylinder to the atmosphere through ports, 26,

.27 and 29. This-prevents any leakage, if there should be any, from accumulating in the cylinder and causing an undesired movement of the door. As the valve shifting piston reaches the end of'its stroke it opens port, 38, permitting free exhaust of fluid from the right end of both cylinders. The mechanism then remains in this position until it is desired to open the door, when the operator turns the valve lever to the opposite inclined position in which the ports, 22 and 23, communicate with port, 24, and admit fluid to the left end of cylinder, 8. The

action above described is then repeated, the air at the right end being compressed to form a cushion, and the piston, 9, passing port, 31, at the end of its stroke to admit fluid to valve shifting cylinder and actuate piston, 33, to shift the valve back to normal lap position thereby cutting off the supply and opening the outlet port, 37.

The power operating device maypreferably be located substantiall in position indicated in, Fig. 7, in which the operating arm, 14, may be nearly horizontal, as indicated in dotted lines, when the door is in its.

closed position, and it will then be practically impossible for a person to manually open the door from its closed position, but as the operating arm is nearly vertical in the open position, the door may be readily moved by hand toward its closed osition. 'While I have described in detai, a preferred construction for obtaining the deslred advantages, it is apparent that my invention isnot limited to any specific means since various forms of mechanism for erforming these functions may readily be evised, all

the spirit and scope of my improvements.

It will be understood that the term door, as einployed herein, includes a gate, switch, OX'aOthBl' similar device ada ted to be thrown to open and closed POSitLOIIS.

Having now described my invention, what 1 I claim as new and desire to secure by Let-;.

'ters 'P'atent is::

1. In an'apparatus of the character de scribed, the combination with a fluid res-- sure motor and connecting mechanism, of

means governed by the movement of said motor; at the'end of its stroke for automati cally cutting off all supply of fluid to the motor, and opening the exhaust therefrom.

sure motor and connectingmechanism, of

valve means for controlling the supply of fluid to the motor, and means governed by the movement of the motor at the end of its stroke, but moving inde endently of the movement of said motor, or positively cutting off all supply of fluid to the motor.

3. In an apparatus of the character described, the combination with a fluid pressure motor and connecting mechanism, of valve means for controlling the supply of fluid to the motor and means overned by the movement of the motor at t 0 end of its stroke, but moving independentl of the movement of said motor, for shi tin said valve means to cut off all supply of uid to the motor.

4. In an apparatus of the character described, the combination with a c linder, piston and connectin mechanism, 0 manually o crated valve or controlling the supply o fluid to the cylinder, and means governed by the movement of the piston at the end of its stroke for opening an exhaust and for cutting off all supply of fluid to the cylinder.

5. In an apparatus of the character described, the combination with a fluid pressure motor and connecting mechanism, of additional fluid pressure actuated means 0 eratin r upon movement of said motor to t e end 0 its stroke for automatically cutting oil the supply of fluid to the motor.

6. In an apparatus of the character described, the combination with a fluid pressure motor and connecting mechanism, of a valve for controlling the supply of fluid to said motor, and additional fluid pressure actuated means operating upon movement of said motor to the end of its stroke for shifting said valve to closed position.

In an apparatusof the character described, the combination with a fluid pressure motor and connecting mechanism, of a valve for controlling the supply of fluid to said motor, and a valve shifting motor actuated by fluid from the main motor to cut oil all supply of fluid to the main motor.

In an apparatus of the character described, the combination with a fluid pressure motor and connecting mechanism, of a valve for controlling the supply of fluid to said motor, a motor for shifting the valve to its closed or lap position and a port controlled by the plston of the main motor for suppllying fluid to said valve shifting motor.

9. ii an apparatus of the character described, the combination with a 'cylinder containing a piston formed with opposite heads connected by a rack bar, a segment and rock shaft operated thereby, and a valve for controlling the sup 1y of fluid to said cylinder, of another cy inder havin ports communicating with the main cylin er and containing a piston with opposite heads, a bar connecting said heads, and means operated thereby for shifting said valve to cut of the supply of fluid to the first cylinder.

10. In an apparatus ot the character described, the combination with a fluid pressure motor and connecting mechanism, of a valve for controlling the supply of fluid to said motor, a valve casing, a sleeve mounted on the valve casing, and a valve shifting motor for actuating said sleeve to automatically move said valve to lap position.

11. In an apparatus of the character described, the combination with acylinder, piston, and connecting mechanism, of a valve mechanism for cont-rolling the admission of fluid under ressure to either end of the cylinder, an means governed by the movement of the piston at the end of its stroke, for opening a free exhaust from the admission side, and for automatically cutting off the su ply of fluid to the cylinder.

12. ii an apparatus of the character described, the combination with a cylinder, piston, and connecting mechanism, of a valve mechanism for controllin the admission of fluid under pressure to cit or end of the cylinder, means governed b the movement of the piston at the end of its stroke for 0 ening a discharge port, and means actuate by the discharge for shifting said valve to cut off the supply of fluid to the cylinder.

13. In an apparatus of the character described, the combination of a cylinder, piston, and connecting mechanism, a valve for admit-ting fluid to either end of said cylinder, means for automatically exhausting the fluid from the admission side to the atmosphere at the end of the stroke, and means for compressin the atmospheric air by the movement of t e piston in the end of the cylinder opposite t e admission and thereby cushion the piston at the end of its stroke.

14. In an apparatus of the character described, the combination of a cylinder, piston, and connecting mechanism, a valve for controlling the admission of fluid to either end of said cylinder, said cylinder having a port for exhausting the fluid from the admission side at the end of the stroke, and a restricted outlet from the end of the cylinder opposite the admission wherebythe atmospheric air therein is compressed by the movement of the piston.

15. In an apparatus of the character described, the combination with a cylinder, piston, and connecting mechanism, of a valve for controlling an admission port to either end of the cylinder and a restricted outlet from the opposite end, and means for freely exhausting the fluid from the admis-' sion sideto the atmosphere at the end of the stroke of the piston.

16. In an apparatus of the character described, the combination with 'a cylinder, piston, and connecting mechanism, of a valve for controlling an admission port to either end of the cylinder and a restricted outlet from the opposite end, and means opoutlet from the opposite end, and a valve 10 erated by the pressure of fluid at the end of shifting motor operated by the pressure of the stroke for shifting the valve to lap position.

17. In an apparatus of the characterdescribed, the combination with a cylinder, piston, and connecting mechanism, of a valve for controlling an admission port to either end of'the cylinder and a restricted fluid from the main cylinder.

In testimony whereof I have hereunto set to hand.

y ALBERT GOTTSCHALK. Witnesses:

A. S. FOWLER, E. A. WRIGHT. 

